1, wipe - if the amount is large, first wipe off with a rag or other cloth (concentrated alkali with water will also be violently exothermic, burn the skin);

2, wash - a large amount of water to rinse clean;

3, paint - weak dilute acid, in addition to boric acid, with dilute vinegar is also possible.

Boric acid in water solubility is relatively small, the concentration can not reach 20%.